Circuit protection system

Abstract

A circuit protection system, which is coupled to an input end of an integrated circuit receiving an input signal from a signal source, includes an electrostatic discharge protection element and a leakage current protection circuit. The leakage current protection circuit includes a first filter capacitor coupled to the electrostatic discharge protection element, wherein when the input signal includes leakage current with an ac component, the first filter capacitor behaves as a high impedance unit for preventing the leakage current from passing through the electrostatic discharge protection component, and when the input signal includes static electricity, the first filter capacitor behaves as a low impedance unit for allowing the input signal to pass through the electrostatic discharge protection element.

Dependencies are inferred from the claim text.